[FIX] point_of_sale: missing variable declaration
[FIX] point_of_sale: missing variable declaration

ygol/odoo,syci/OCB,Elico-Corp/odoo_OCB,tvtsoft/odoo8,hip-odoo/odoo,cdrooom/odoo,hip-odoo/odoo,microcom/odoo,dfang/odoo,Elico-Corp/odoo_OCB,Grirrane/odoo,odoousers2014/odoo,optima-ict/odoo,microcom/odoo,sysadminmatmoz/OCB,sysadminmatmoz/OCB,storm-computers/odoo,ygol/odoo,alhashash/odoo,sysadminmatmoz/OCB,Grirrane/odoo,storm-computers/odoo,dfang/odoo,mkieszek/odoo,stephen144/odoo,mkieszek/odoo,microcom/odoo,optima-ict/odoo,stephen144/odoo,OpusVL/odoo,microcom/odoo,laslabs/odoo,inspyration/odoo,stephen144/odoo,alhashash/odoo,dfang/odoo,optima-ict/odoo,syci/OCB,hip-odoo/odoo,stephen144/odoo,addition-it-solutions/project-all,syci/OCB,tvtsoft/odoo8,laslabs/odoo,sysadminmatmoz/OCB,syci/OCB,Elico-Corp/odoo_OCB,deKupini/erp,dfang/odoo,odoousers2014/odoo,inspyration/odoo,sysadminmatmoz/OCB,mkieszek/odoo,cdrooom/odoo,microcom/odoo,Grirrane/odoo,laslabs/odoo,tvtsoft/odoo8,odoousers2014/odoo,hip-odoo/odoo,laslabs/odoo,deKupini/erp,sysadminmatmoz/OCB,cdrooom/odoo,Grirrane/odoo,OpusVL/odoo,addition-it-solutions/project-all,hip-odoo/odoo,laslabs/odoo,Grirrane/odoo,stephen144/odoo,bplancher/odoo,optima-ict/odoo,alhashash/odoo,mkieszek/odoo,bplancher/odoo,addition-it-solutions/project-all,mkieszek/odoo,storm-computers/odoo,tvtsoft/odoo8,bplancher/odoo,addition-it-solutions/project-all,tvtsoft/odoo8,dfang/odoo,alhashash/odoo,syci/OCB,Elico-Corp/odoo_OCB,OpusVL/odoo,alhashash/odoo,dfang/odoo,OpusVL/odoo,optima-ict/odoo,inspyration/odoo,storm-computers/odoo,bplancher/odoo,deKupini/erp,odoousers2014/odoo,bplancher/odoo,syci/OCB,ygol/odoo,ygol/odoo,addition-it-solutions/project-all,tvtsoft/odoo8,inspyration/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,ygol/odoo,deKupini/erp,deKupini/erp,addition-it-solutions/project-all,odoousers2014/odoo,laslabs/odoo,odoousers2014/odoo,cdrooom/odoo,storm-computers/odoo,microcom/odoo,storm-computers/odoo,ygol/odoo,hip-odoo/odoo,stephen144/odoo,optima-ict/odoo,Grirrane/odoo,mkieszek/odoo,alhashash/odoo,ygol/odoo,sysadminmatmoz/OCB